get.selected.data: Extract columns from dataframe and compute row means...

In claus-e-andersen/clanTools: R functions of general use for data analysis and presentation

Description

Useful function for extracting data and combining data based on a vector of column names in a dataframe. If name.vec is NULL, then assign the value given in null.default Used in: step42-electrometer-cal-single-file-009-6 Se also rowMeans.ca and get.selected.data.sd.

Sample use: read.table(fn.full,sep=";",header=TRUE,quote = "\"",) %>%

filter(step.i %in% use.these.steps) %>%

mutate(V.base = get.selected.data(.,V.base.use.vec)) %>%

mutate(V.raw = get.selected.data(.,V.use.vec)) %>%

mutate(V.ref = V.raw - V.base)

Usage

df %>% mutate(V.base = get.selected.data(.,V.base.use.vec))

Arguments

df	data frame
name.vec	names of rows.
null.default	value to use if there are no values (default to NA). This should be a value of class equal to numeric.

Value

string vector

Author(s)

Claus E. Andersen

claus-e-andersen/clanTools documentation built on Oct. 23, 2020, 7:59 a.m.